/***
	Copyright (c) 2008-2011 CommonsWare, LLC
	Licensed under the Apache License, Version 2.0 (the "License"); you may not
	use this file except in compliance with the License. You may obtain	a copy
	of the License at http://www.apache.org/licenses/LICENSE-2.0. Unless required
	by applicable law or agreed to in writing, software distributed under the
	License is distributed on an "AS IS" BASIS,	WITHOUT	WARRANTIES OR CONDITIONS
	OF ANY KIND, either express or implied. See the License for the specific
	language governing permissions and limitations under the License.
	
	From _The Busy Coder's Guide to Advanced Android Development_
		http://commonsware.com/AdvAndroid
*/

	 
package com.commonsware.android.constants;

import android.app.AlertDialog;
import android.app.ListActivity;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.DialogInterface;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.EditText;
import android.widget.ListAdapter;
import android.widget.SimpleCursorAdapter;

public class ConstantsBrowser extends ListActivity {
	private static final int ADD_ID = Menu.FIRST+1;
	private static final int DELETE_ID = Menu.FIRST+3;
	private static final String[] PROJECTION = new String[] {
			Provider.Constants._ID, Provider.Constants.TITLE,
			Provider.Constants.VALUE};
	private Cursor constantsCursor;
	
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		
		constantsCursor=managedQuery(Provider.Constants.CONTENT_URI,
																	PROJECTION, null, null, null);
	
		ListAdapter adapter=new SimpleCursorAdapter(this,
													R.layout.row, constantsCursor,
													new String[] {Provider.Constants.TITLE,
																					Provider.Constants.VALUE},
													new int[] {R.id.title, R.id.value});
		
		setListAdapter(adapter);
		registerForContextMenu(getListView());
	}
	
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		menu.add(Menu.NONE, ADD_ID, Menu.NONE, "Add")
				.setIcon(R.drawable.add)
				.setAlphabeticShortcut('a');

		return(super.onCreateOptionsMenu(menu));
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		switch (item.getItemId()) {
			case ADD_ID:
				add();
				return(true);
		}

		return(super.onOptionsItemSelected(item));
	}
	
	@Override
	public void onCreateContextMenu(ContextMenu menu, View v,
																		ContextMenu.ContextMenuInfo menuInfo) {
		menu.add(Menu.NONE, DELETE_ID, Menu.NONE, "Delete")
				.setIcon(R.drawable.delete)
				.setAlphabeticShortcut('d');
	}

	@Override
	public boolean onContextItemSelected(MenuItem item) {
		switch (item.getItemId()) {
			case DELETE_ID:
				AdapterView.AdapterContextMenuInfo info=
					(AdapterView.AdapterContextMenuInfo)item.getMenuInfo();

				delete(info.id);
				return(true);
		}

		return(super.onOptionsItemSelected(item));
	}
	
	private void add() {
		LayoutInflater inflater=LayoutInflater.from(this);
		View addView=inflater.inflate(R.layout.add_edit, null);
		final DialogWrapper wrapper=new DialogWrapper(addView);
		
		new AlertDialog.Builder(this)
			.setTitle(R.string.add_title)
			.setView(addView)
			.setPositiveButton(R.string.ok,
													new DialogInterface.OnClickListener() {
				public void onClick(DialogInterface dialog,
															int whichButton) {
					processAdd(wrapper);
				}
			})
			.setNegativeButton(R.string.cancel,
													new DialogInterface.OnClickListener() {
				public void onClick(DialogInterface dialog,
															int whichButton) {
					// ignore, just dismiss
				}
			})
			.show();
	}
	
	private void delete(final long rowId) {
		if (rowId>0) {
			new AlertDialog.Builder(this)
				.setTitle(R.string.delete_title)
				.setPositiveButton(R.string.ok,
														new DialogInterface.OnClickListener() {
					public void onClick(DialogInterface dialog,
																int whichButton) {
						processDelete(rowId);
					}
				})
				.setNegativeButton(R.string.cancel,
														new DialogInterface.OnClickListener() {
					public void onClick(DialogInterface dialog,
																int whichButton) {
					// ignore, just dismiss
					}
				})
				.show();
		}
	}
	
	private void processAdd(DialogWrapper wrapper) {
		ContentValues values=new ContentValues(2);
		
		values.put(Provider.Constants.TITLE, wrapper.getTitle());
		values.put(Provider.Constants.VALUE, wrapper.getValue());
		
		getContentResolver().insert(Provider.Constants.CONTENT_URI,
																	values);
		constantsCursor.requery();
	}
	
	private void processDelete(long rowId) {
		Uri uri=ContentUris.withAppendedId(Provider.Constants.CONTENT_URI,
																			 rowId);
		getContentResolver().delete(uri, null, null);
		constantsCursor.requery();
	}
	
	class DialogWrapper {
		EditText titleField=null;
		EditText valueField=null;
		View base=null;
		
		DialogWrapper(View base) {
			this.base=base;
			valueField=(EditText)base.findViewById(R.id.value);
		}
		
		String getTitle() {
			return(getTitleField().getText().toString());
		}
		
		float getValue() {
			return(new Float(getValueField().getText().toString())
																									.floatValue());
		}
		
		private EditText getTitleField() {
			if (titleField==null) {
				titleField=(EditText)base.findViewById(R.id.title);
			}
			
			return(titleField);
		}
		
		private EditText getValueField() {
			if (valueField==null) {
				valueField=(EditText)base.findViewById(R.id.value);
			}
			
			return(valueField);
		}
	}
}
